(1981). SAS programmer's guide.
Lua i Stíl Chicago (17ú heag.)SAS Programmer's Guide. 1981.
Lua MLA (9ú heag.)SAS Programmer's Guide. 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)